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MSL: Track location component to match vecsize between shader stages.

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Matching output/input struct member types between shader stages could fail if
a location is shared between members, each using different components of that
location, because the member vecsize was only stored once for the location.

Add MSLShaderInput::component member.
Use LocationComponentPair to key inputs_by_location, instead of just location.
ensure_correct_input_type() pass component value as well as location.
This commit is contained in:
Bill Hollings 2021-09-20 17:57:11 -04:00
parent fe1af2ae72
commit 548a23da34
2 changed files with 25 additions and 17 deletions
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37
spirv_msl.cpp
View File

@ -58,7 +58,7 @@ CompilerMSL::CompilerMSL(ParsedIR &&ir_)
void CompilerMSL::add_msl_shader_input(const MSLShaderInput &si)
{
inputs_by_location[si.location] = si;
inputs_by_location[{si.location, si.component}] = si;
if (si.builtin != BuiltInMax && !inputs_by_builtin.count(si.builtin))
inputs_by_builtin[si.builtin] = si;
}
@ -2224,9 +2224,10 @@ void CompilerMSL::add_plain_variable_to_interface_block(StorageClass storage, co
if (get_decoration_bitset(var.self).get(DecorationLocation))
{
uint32_t locn = get_decoration(var.self, DecorationLocation);
uint32_t comp = get_decoration(var.self, DecorationComponent);
if (storage == StorageClassInput)
{
type_id = ensure_correct_input_type(var.basetype, locn, 0, meta.strip_array);
type_id = ensure_correct_input_type(var.basetype, locn, comp, 0, meta.strip_array);
var.basetype = type_id;
type_id = get_pointee_type_id(type_id);
@ -2238,6 +2239,8 @@ void CompilerMSL::add_plain_variable_to_interface_block(StorageClass storage, co
ib_type.member_types[ib_mbr_idx] = type_id;
}
set_member_decoration(ib_type.self, ib_mbr_idx, DecorationLocation, locn);
if (comp)
set_member_decoration(ib_type.self, ib_mbr_idx, DecorationComponent, comp);
mark_location_as_used_by_shader(locn, get<SPIRType>(type_id), storage);
}
else if (is_builtin && is_tessellation_shader() && inputs_by_builtin.count(builtin))
@ -2393,8 +2396,8 @@ void CompilerMSL::add_composite_variable_to_interface_block(StorageClass storage
uint32_t comp = get_decoration(var.self, DecorationComponent);
if (storage == StorageClassInput)
{
var.basetype = ensure_correct_input_type(var.basetype, locn, 0, meta.strip_array);
uint32_t mbr_type_id = ensure_correct_input_type(usable_type->self, locn, 0, meta.strip_array);
var.basetype = ensure_correct_input_type(var.basetype, locn, comp, 0, meta.strip_array);
uint32_t mbr_type_id = ensure_correct_input_type(usable_type->self, locn, comp, 0, meta.strip_array);
if (storage == StorageClassInput && pull_model_inputs.count(var.self))
ib_type.member_types[ib_mbr_idx] = build_msl_interpolant_type(mbr_type_id, is_noperspective);
else
@ -2739,9 +2742,10 @@ void CompilerMSL::add_plain_member_variable_to_interface_block(StorageClass stor
if (has_member_decoration(var_type.self, mbr_idx, DecorationLocation))
{
uint32_t locn = get_member_decoration(var_type.self, mbr_idx, DecorationLocation);
uint32_t comp = get_member_decoration(var_type.self, mbr_idx, DecorationComponent);
if (storage == StorageClassInput)
{
mbr_type_id = ensure_correct_input_type(mbr_type_id, locn, 0, meta.strip_array);
mbr_type_id = ensure_correct_input_type(mbr_type_id, locn, comp, 0, meta.strip_array);
var_type.member_types[mbr_idx] = mbr_type_id;
if (storage == StorageClassInput && pull_model_inputs.count(var.self))
ib_type.member_types[ib_mbr_idx] = build_msl_interpolant_type(mbr_type_id, is_noperspective);
@ -2758,7 +2762,7 @@ void CompilerMSL::add_plain_member_variable_to_interface_block(StorageClass stor
uint32_t locn = get_accumulated_member_location(var, mbr_idx, meta.strip_array);
if (storage == StorageClassInput)
{
mbr_type_id = ensure_correct_input_type(mbr_type_id, locn, 0, meta.strip_array);
mbr_type_id = ensure_correct_input_type(mbr_type_id, locn, 0, 0, meta.strip_array);
var_type.member_types[mbr_idx] = mbr_type_id;
if (storage == StorageClassInput && pull_model_inputs.count(var.self))
ib_type.member_types[ib_mbr_idx] = build_msl_interpolant_type(mbr_type_id, is_noperspective);
@ -3602,7 +3606,7 @@ uint32_t CompilerMSL::add_interface_block(StorageClass storage, bool patch)
// the struct containing them is the correct size and layout.
for (auto &input : inputs_by_location)
{
if (location_inputs_in_use.count(input.first) != 0)
if (location_inputs_in_use.count(input.first.location) != 0)
continue;
// Create a fake variable to put at the location.
@ -3642,7 +3646,10 @@ uint32_t CompilerMSL::add_interface_block(StorageClass storage, bool patch)
ptr_type.self = array_type_id;
auto &fake_var = set<SPIRVariable>(var_id, ptr_type_id, storage);
set_decoration(var_id, DecorationLocation, input.first);
set_decoration(var_id, DecorationLocation, input.first.location);
if (input.first.component)
set_decoration(var_id, DecorationComponent, input.first.component);
meta.strip_array = true;
meta.allow_local_declaration = false;
add_variable_to_interface_block(storage, ib_var_ref, ib_type, fake_var, meta);
@ -3794,7 +3801,7 @@ uint32_t CompilerMSL::ensure_correct_builtin_type(uint32_t type_id, BuiltIn buil
// Ensure that the type is compatible with the shader input.
// If it is, simply return the given type ID.
// Otherwise, create a new type, and return its ID.
uint32_t CompilerMSL::ensure_correct_input_type(uint32_t type_id, uint32_t location, uint32_t num_components, bool strip_array)
uint32_t CompilerMSL::ensure_correct_input_type(uint32_t type_id, uint32_t location, uint32_t component, uint32_t num_components, bool strip_array)
{
auto &type = get<SPIRType>(type_id);
@ -3804,7 +3811,7 @@ uint32_t CompilerMSL::ensure_correct_input_type(uint32_t type_id, uint32_t locat
if (type.basetype == SPIRType::Struct || type.array.size() > max_array_dimensions)
return type_id;
auto p_va = inputs_by_location.find(location);
auto p_va = inputs_by_location.find({location, component});
if (p_va == end(inputs_by_location))
{
if (num_components > type.vecsize)
@ -14537,11 +14544,11 @@ SPIRType CompilerMSL::get_presumed_input_type(const SPIRType &ib_type, uint32_t
{
SPIRType type = get_physical_member_type(ib_type, index);
uint32_t loc = get_member_decoration(ib_type.self, index, DecorationLocation);
if (inputs_by_location.count(loc))
{
if (inputs_by_location.at(loc).vecsize > type.vecsize)
type.vecsize = inputs_by_location.at(loc).vecsize;
}
uint32_t cmp = get_member_decoration(ib_type.self, index, DecorationComponent);
auto p_va = inputs_by_location.find({loc, cmp});
if (p_va != end(inputs_by_location) && p_va->second.vecsize > type.vecsize)
type.vecsize = p_va->second.vecsize;
return type;
}

5
spirv_msl.hpp
View File

@ -60,6 +60,7 @@ enum MSLShaderInputFormat
struct MSLShaderInput
{
uint32_t location = 0;
uint32_t component = 0;
MSLShaderInputFormat format = MSL_SHADER_INPUT_FORMAT_OTHER;
spv::BuiltIn builtin = spv::BuiltInMax;
uint32_t vecsize = 0;
@ -837,7 +838,7 @@ protected:
void mark_location_as_used_by_shader(uint32_t location, const SPIRType &type,
spv::StorageClass storage, bool fallback = false);
uint32_t ensure_correct_builtin_type(uint32_t type_id, spv::BuiltIn builtin);
uint32_t ensure_correct_input_type(uint32_t type_id, uint32_t location,
uint32_t ensure_correct_input_type(uint32_t type_id, uint32_t location, uint32_t component,
uint32_t num_components, bool strip_array);
void emit_custom_templates();
@ -980,7 +981,7 @@ protected:
Options msl_options;
std::set<SPVFuncImpl> spv_function_implementations;
// Must be ordered to ensure declarations are in a specific order.
std::map<uint32_t, MSLShaderInput> inputs_by_location;
std::map<LocationComponentPair, MSLShaderInput> inputs_by_location;
std::unordered_map<uint32_t, MSLShaderInput> inputs_by_builtin;
std::unordered_set<uint32_t> location_inputs_in_use;
std::unordered_set<uint32_t> location_inputs_in_use_fallback;